Drum



Jan. 18, R. w. HAGEN DRUM Filed Feb. 1, 1923 INVE If.

A TTORNEY Patented Jan. 18, 1927.

UNITED STATES PATENT OFFIUE.

RUSSELL W. HAGEN, OF CHICAGO, ILLINOIS.

DRUM.

The general object of my invention is to simplify and improve the construction of drums and particularly the adjustable features thereof.

Another object of my invention is to provide a drum of novel shape which can be adjusted properly, and in which the adj ustable parts shall be so disposed as to avoid danger of catching into clothing and the like.

I aim also to provide a construction in which the formation of the drum shall be such as to accommodate certain of the adjustable parts and at the same time strengthon the drum as a whole.

My invention consists generally in a drum of the form, arrangement, construction, and cooperation of the parts thereof whereby the above named objects, together with others that will appear hereinafter, are at tainable, and my invention will be more readily understood by reference to the accompanying drawings which illustrate what I consider, at the present time, to be the preferred embodiment thereof.

In said drawings:

Fig. 1 is a plan view of a drum embodying my invention.

Fig. 2 is an enlarged sectional view substantially along the line 22 of Fig. 1.

Fig. 3 is an enlarged sectional view substantially along the line 33 of Fig. 2; and

Fig. 4 is a detail sectional view substantially along the line 4-4 of Fig. 3.

" In the construction shown in the drawings, the body of the drum is formed by two annular parts 1. and 2, preferably formed of metal. The parts 1 and 2 are formed with channel portions 3 and 4 respectively which extend outwardly from the plane of the upper and lowermost extremities of the drum body. These channels, it will be observed interfit. In assembling the parts 1 and 2 together, the free margin of the channel portion 4, is left as forming a continuation of said channel portion and the other channel portion 3 is then inserted therein, after which said marginal portion is turned or spun inwardly upon the annular flange part of said channel portion 3. In the annular flange parts of the channel portions is a plurality of tubular nuts or sleeves 5 each with a head on the outside of said flange parts. The inner end of the sleeve 5 is threaded and a nut 6 is screwed thereon.

Positioned between the nut 6 and the adjacent wall of the channel portion of the drum body will be found an angle clip 7 which further strengthens the parts and which is also held in place by said nut.

Thus all of the parts are rigidly held in desired placed position by the structure described.

The sleeve 5 is also internally threaded as indicated at 8 and accommodates the threaded end portion 10 of the rod 9. There are a plurality of these various parts but inasmuch as the construction of all are alike, a description of the construction and operation of one thereof will sufiice for all. The upper end of the rod 9 extends through a clip 11 which engages the tension hoop 12. The tension hoop 12, in turn, bears against the flesh ring 13 to which the head vellum or skin 14 is secured. The outer end of the rod 9 is preferably squared so that it can be rotated by means of a key. By turning the rod 9 the flesh hoop can be moved axially of the drum, either to stretch or loosen the head vellum or skin 14: to bring the same to the desired stateof tension.

It will be observed that the channel portion of the drum extends outwardly beyond the plane of the adjustable rods so that all danger of injuring or disturbing the rods by engagement with extraneous articles is eliminated. Furthermore by the construe tion illustrated an extremely rigid. durable and eflicient drum is provided. The channel construct-ion also performs another important function in that it acts as an expair sion chamber for the sound waves set in motion in the playing of the drum. so that overtones are absorbed therein and cannot produce rattling and other objectionable noises. Again the angle clips 7 are impor tant because they assist in rigidifying the drum shell which is made of thin sheet metal.

The many advantages of my drum construction will be understood by those skilled in the art to which this appertains without further comment.

I claim:- 7

1. A drum embodying therein a body comprising two body shell members having interengaging channel portions including annular flangelike parts, av head and head ring on each end of the body, a tension hoop engaged with each head ring sleeves eX- tending through said fiangelike parts and securing them together, and tension rods operatively engaged with the tension hoops and threaded into said sleeves in said flangelike parts.

A drum embodying; therein a bod comprising tvvo body shell members having intereng'aging channel portions includ ing' annular flangelike pats, a head and ring on each end of the body, sleeves extending through said fiangelilze parts and securing them together, tension rods threaded into said sleeves, corner clips gaging portions o'l said body shell nienihe"? and said flange parts and though which said sleeves also ext nd, and nuts threaded on said sleeves and securing said corner rlips against said flange parts.

3. A drum embodying therein, a body shell having an annular ehannel portion including top and bottom annular tlang'elike parts, a head and head ring on each end of the body shell said channel portions defining an expansion chamber exten g eirwuniterent iall about the body shell at a point between the ends thereof, a tension hoop engaged with each head ring", means fixed in said top and bottom H1119 liiC part and tension rods extending thr h said top and bottom fiangelilze parts the tension hoops and operative said last mentioned niean In testimony wheres l have hereunto set nrv hand, this 21th dav of danuar 102 3. 

